I use the no-name brand from Loblaws. 1/4 cup usually makes about 2 1/2 cups of popcorn.
Next time you make popcorn for yourself measure out your 1/4 cup or your 1/2 cup of kernels. When the popcorn is popped measure out how many cups of popped corn you get then tape a note to the fridge or the container you keep the kernels in so that next time you have a quick reference guide.
